CN1043871C - container - Google Patents

Abstract

A container 1 for lubricant has a cap 31 for sealing one end 50 of a cylindrical tube 2. The cap has a bottom 32 from which a peripheral inner flange 36 protrudes in the axial direction, which inner flange abuts against the inner side of the tube rim and has a dual function, that is, in addition to the sealing function, a second function as a plunger for dispensing the contents of the tube by means of a plunger rod.

Description

container

The invention relates to a container, in particular to a lubricant cartridge and a cap for sealing the lubricant cartridge.

Today, environmental awareness is greater than in the past and containers must meet high safety requirements, especially for containers used to store environmentally harmful substances. Nevertheless, such containers must be simple and easily manufactured at low cost, and their handling must also be simple and easy, both for filling (which is preferably fully self-sealing) and for resealing with a high degree of and maintainable safety ( even after repeated opening and closing operations). The closing mechanism must even be able to withstand external and internal strains up to a certain level, so that leakage can be avoided with a considerable degree of safety. Furthermore, the contents of such a container must be able to be released in a simple and reliable manner.

Previously known containers and their closure mechanisms have failed to meet these requirements, at least not all at the same time.

Previously known caps in this technical field serve as closure mechanisms for a simple or the like during filling and use thereof. When using the cartridge, the cap is normally removed and discarded, and thus cannot perform further functions.

In addition to this limited functionality, previously known caps often suffer from the inability to seal the container sufficiently securely. Leakage is thus easy and frequent, and usually an entire container or possibly even an adjacent container whose contents have leaked is discarded, as it would be very bad if hands were stained or cloth etc. were soiled.

Apart from possible leakage, the previously known caps are in any case very difficult to remove, especially those not designed as screw caps. If the cap is designed as a screw cap, increased material thickness and additional mechanisms are required to provide internal threads on the cap, and further additional mechanisms are required to provide external threads on a barrel end.

By US-A-4 934 570 patent cases, previously known a kind of cap is used for sealing an end of the instant food container. The cap, in the middle of an inner flange, is provided with a circumferential notch which is torn off when a plunger is pushed against the bottom of the cap, so that the roughly inner flange The bottom of the cap, half of the axial length of the rim, is used as a plunger disc to deliver instant food. This design obviously has disadvantages, because it may be very difficult and require considerable force to break the flange in the area of the score, where the flange continues in a straight manner at the two sides and in the The notches are at right angles thereto. For this reason, as disclosed in the patent, it is necessary to substantially increase the thickness of the inner flange above the notch, in such a way that it is clear that the upper and outer flanges of the inner flange must avoid being driven by the plunger disk if the notch If the mark does not break despite the application of high pressure. Furthermore, the cap is not fixedly attached to the container in any way, and pressure from within the container, such as when squeezing the container, will then cause the cap to slide off the container. Even the dispensing of the contents of the container should be considered inconvenient, since the portion of the inner flange forming part of the plunger disc undergoes a shape change from a resting in a converging shape towards the contents of the container. position changes to a parallel position under applied plunger pressure, therefore, part of the contents of the container is likely to get between the inner flange and the container wall, thereby preventing normal plunger function, or back along the inner flange The free edge of the rim leaks out. Finally, the remainder of the inner flange and the portion of the outer flange that remains on the container end are not cemented together in any way. These parts may be accidentally discarded at any time and thus constitute a real waste problem.

Such a closing mechanism may be tolerated to a limited extent because it is a non-hazardous substance, such as instant food. However, this is certainly not suitable for substances harmful to the environment, such as lubricants or the like.

The object of the present invention is therefore to provide an advantageous container with an equally advantageous closing mechanism which avoids or solves the above-mentioned disadvantages and thus simultaneously meets all the above-mentioned requirements.

Another object of the present invention is to improve in all respects the previously known containers and their closure mechanisms, in particular for enhancing the application of the cap, ensuring the application position of the cap despite considerable external and/or internal strains, for example for pressure, and for quick and easy removal of the caps when needed. Furthermore, it should be possible to save material and have a quick, simple and safe changeover to the plunger function of the cap without damaging the cap or other parts of the container. In some instances, the portion of the cap that remains on the container after the plunger has been disengaged needs to be able to be secured thereto to prevent inadvertent disengagement. The changeover of the cap from sealing to plunger function must be possible in a simple manner, either manually, e.g. by tearing off an outer flange or mechanically/automatically by placing the container in e.g. a quick tool middle. Mechanisms must be provided for safe control, guidance/sealing of the plunger, and the functional boundary between the cap and the plunger must be relatively easy to achieve the desired separation and have a high degree of safety against undesired separation. Furthermore, this region must be selected to facilitate separability and subsequent guidance, control and sealing. Relevant parts of these characteristics must also be provided on another cap which seals the end of the other container and only has a sealing function, so the container must be designed so that these characteristics go further, whereby, for example, gaps, shrinkage, etc. will be under control.

According to the invention, there is provided a container and at least one closure mechanism comprising a cap for sealing, in particular an end of a substantially cylindrical tube for viscous or pasty substances, the cap having a bottom , protruding from the bottom in the direction of the approximate axis a peripheral inner flange intended to abut against the inner side of the rim, and the cap will have a dual function, namely a first The second function is to serve as a plunger for dispensing the contents of the tube by means of a plunger rod. The boundary edge portion of the inner flange that bends away from the bottom is connected to a bridge portion, which is located approximately in a radial direction. In plan, the bridging portion leads to an outer flange substantially concentric with the inner flange, the outer flange surrounds the tube end together with the inner flange and the bridging portion, the plunger cap is provided A weakened portion with a groove-like periphery to allow disengagement of the base during transition to the plunger function, characterized in that the weakened portion is provided in or on the bridge, and the flange and the tube upper face At least one surface relative to each other is provided with at least one peripheral blocking and/or sealing mechanism acting on the other side for at least temporarily positioning or retaining or sealing the plunger cap relative to the tube. In addition, the other tube end is sealed by a specially shaped cap provided with a sprue, which cap cooperates with a also specially designed tube end.

The structural features and purpose of the present invention will be further described below in conjunction with the accompanying drawings.

Brief description of the drawings:

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a cross-sectional view along the diametrical axis of an embodiment of a container according to the invention, the container consisting of a right cylindrical tube and two caps sealing the tube.

Fig. 2 is a partial cross-sectional view along the diametrical axis of an embodiment of a closure mechanism according to the present invention, the partial cross-sectional view being similar to Fig. 1 but with a modified cap.

3 and 4 are partial cross-sectional views along the diametrical axis of an embodiment of a right cylindrical tube according to the present invention, which is sealed at one end by a cap similar to that shown in FIG. The location is sealed by a cap according to an embodiment of the invention.

Figure 5 is a side view of the container shown in Figure 1 .

Figure 6 is a side view of the tube shown in Figures 1 and 5 .

Figure 7 is a diametrical axis sectional view of the tube shown in Figures 1, 5 and 6;

FIG. 8 is an enlarged sectional view of the end profile of the tube according to FIG. 7 .

FIG. 9 is a side view of an alternative embodiment similar to FIG. 5 .

Fig. 10 is a cross-sectional view along a diameter axis of a container according to Fig. 9 .

FIG. 11 is a side view of another variant embodiment similar to FIG. 5 .

Fig. 12 is a sectional view along a diameter axis of the container according to Fig. 10 .

Figure 13 is an enlarged diametric axial cross-sectional view of a plunger cap according to Figures 1, 4, 5 and 9-12.

FIG. 14 is an enlarged sectional view of the upper portion of FIG. 12 .

15 to 18 are perspective views, a front view, a side view and a bottom view, respectively, showing the plunger cap according to FIG. 13 , seen from above.

Figure 19 is a perspective view of a cap of a variant design similar to that of Figures 15 to 18, seen from above.

20 to 22 show the cap according to FIG. 14 seen from below, from the side and from above in perspective view.

23 to 26 show the sprue cap according to FIG. 14 seen from below, from the side, from above and in a perspective view from above.

A container according to the invention is denoted as a whole by reference numeral 1 . The container comprises a tube 2, preferably right cylindrical, made of plastic, preferably by injection moulding. Another part of the container is a cap 3 which at least partially matches the container in terms of shape. The tube is preferably made of polyethylene HD 7028 and the cap is preferably made of polyethylene LD+HD. The tube 2 features a flange 5 which preferably surrounds a tube end 4 . According to a preferred embodiment, the flanges extend radially inwards and outwards from respective cylindrical surfaces 7 and 8 of the tube wall 6 to form an inner flange 9 and an outer flange 10 .

According to a preferred embodiment, the inner flange 9 protrudes from the adjacent cylindrical surface 7 longer than the outer flange 10 protrudes from the cylindrical surface 8 . Typically, the inner flange may protrude by 1 to 3 mm, preferably about 2 mm, and the outer flange may protrude by 0.5 to 2.5 mm, preferably about 1 mm. This makes the inner flange produce a larger retaining force on the cap 3 than the outer flange. In this way, a cap attached to the tube can withstand considerable strains, particularly those that transmit a pressure from the inside to the cap when the contents of the container are squeezed, for example when a The tube falls or is grasped hard. At the same time, it is nevertheless quite easy to remove the cap, e.g. temporarily, because for this the free outer edge of the cap, which is located outside the tube, is gripped and obliquely away from the tube end 4, And the radially shorter outer flange creates less resistance.

The inner flange 9 and the outer flange 10 expediently share a common upper limiting surface 11 forming the free axial end surface of the pipe end 4 .

According to a preferred embodiment, the inner flange 9 is shorter than the outer flange 10 in the axial direction. Typically, the inner flange may be 1 to 3mm and preferably about 2mm long, while the outer flange measures 2 to 4mm and preferably about 2.5mm in the axial direction, whereby an inner seal Surface 12 and an outer sealing surface 14 are formed, preferably in cylindrical, coaxial surfaces. The outer flange 10 is terminated by a shoulder 15 at its axial end turned away from the limiting surface 11 (this shoulder preferably lies in a radial plane), while the inner flange is terminated by a corresponding region It is preferably an undercut surface 13 , which can be straight or concave to form a pointed rim portion 18 , the purpose of which is to exert an additional sealing effect relative to the cap 3 . The angle between surfaces 12 and 13 is between 30° and 85°, preferably about 70°. Even an angle between the surfaces 11 and 12 not equal to 90° is possible, ie an angle greater than 90°, for example 90° to 130°, preferably about 110°. The slope or curvature at the location of the outer side of surface 12 facilitates the pushing of a cap onto the tube.

The cap 3 itself is partially matched to the shape of the tube end 4 as shown and described. Thus, the cap is shown to have a collar portion 16 in a radial plane which is inwardly connected to a right cylindrical collar portion 17 formed by a base 19. Closed, and the bottom is preferably slightly concave when viewed from the outside. The three parts 16, 17 and 19 exhibit approximately the same material thickness, for example about 1 mm. In the outward direction, the collar portion 16 is connected to an outer right-cylindrical collar portion 20 which is as long as the inner collar portion 17 in the axial direction, measured from the collar 16 or slightly longer.

Said portions 16 , 17 and 20 delimit an annular groove 21 for receiving and abutting the pipe end 4 . For this purpose, the parts 17 and 20 are provided with peripheral shoulders, protrusions or the like 24 and 28 respectively, which face each other with the difference in axial extension between the inner and outer flanges previously described and shown. is an offset along the axis. After a cap is securely put on, the shoulders, projections or the like 24 and 28 are provided directly below the surfaces 13 and 15 so that the cap cannot be removed without forcefully pulling away from the pipe end 4. remove.

The axial half 27 of the collar portion 20 may be bent outwards or provided with a peripheral internal bevel 29 for facilitating the pushing of the cap onto the tube end. For the same purpose, the half of the collar portion 17 connected to the bottom 19 can be provided with a bevel 25 .

Since the outer collar portion 20 does not need to produce the same impedance characteristics for the inadvertent removal of the cap and the cap in turn must be removable to some extent, the collar portion is suitably designed to be slightly shaped. Thin, eg 0.7 mm thick, while the other two parts and even the bottom are about 1 mm thick, all dimensions here are according to a non-limiting example.

In addition to the previously described effects, the closure mechanism according to the invention is characterized by the following properties. For the normal sealing position according to FIG. 1 , an excellent seal is obtained over the entire circumference of the tube on both insides, end sides and outside. If desired, the annular groove 21 can be provided with a sealing medium, eg silicon, when filling and sealing the tube in a workshop. In this way, an additional high degree of security against leakage can be guaranteed during transport to the user.

If a filled tube, sealed by a cap as described and shown, is subjected to internal pressure for the aforementioned reasons, this pressure will primarily affect the bottom of the cap, which is pushed upwards to obtain a flatter shape whereby the collar portion 17 is pressed against or towards the tube wall in the region of connection between the collar portion and the bottom and will increase the shoulder, protrusion or the like 24 against At or around the sealing pressure of the ring portion 18. The pointed shape of the collar portion 18 ensures in a very functional manner that the cap will not come loose under slight or moderate pressure from the inside.

The parts 16 and 20 and in particular the shoulder, protrusion or the like 28 will be subjected to almost infinite pressure when pressure is applied axially from the outside on the cap bottom. The shoulder, protrusion or the like 28 here acts as a sort of roll stop which, in combination with the shoulder 15, prevents the peripheral channel portion of the cap from "slipping" inwardly around the pipe end 4. ".

On the other hand, if it is desired to remove the cap (perhaps only temporarily), it can be done quite easily by grasping at any position from the outside of the cap portion 27 and pulling and bending upwards as shown in FIG. The position is such that the shoulder, protrusion or the like 28 can be completed over the shoulder 15 . This can be enhanced by making the collar portion 20 slightly thinner in shape, and making the cap out of a flexible plastic material and/or a material that is not extremely flexible in itself but is flexible due to the thickness of the material chosen. With continued pulling away from the cap, the shoulder, protrusion or the like 24 slides forward and finally over the rim portion 18 until the cap is completely removed.

When it is desired to reseal the tube, the cap is loosely attached to the tube end 4 and then pushed until the shoulders or protrusions of the cap have slid past the shoulders of the tube end, elastically deforming relative The cap portion of the cap has finally been buckled behind the shoulders or protrusions and the cap is blocked in this position.

As can be seen, the embodiment of Figures 1 and 2 differs from the embodiment shown in Figure 3 only in that the shoulders 24 and 28 have been raised and by making the shape of the slopes 25 and 29 more simplified. replace.

Figures 3 and 4 show at least in principle a preferred embodiment of the tube of the invention provided with two different closing mechanisms, each in an end position. One of the caps and one of the tube ends is identical or similar to the upper part of Figures 1 or 2, while the other closure mechanism is different and generally designated 30. Said further closure mechanism comprises a cap 31 having a preferably flat bottom 32 which roughly fills the interior of the tube and which may be provided with a circular recess 33 in the center, which recess It has a central protrusion 34 and a peripheral ring groove 35 . Parts 33 to 35 are for abutment of the plunger rod of, for example, a grease gun, and/or they can be removed by pushing the central bottom, which in any case still passes through a small diameter. To the protrusion 63 (which is not shown in Fig. 4 but is shown in Figs. 15 to 19) to the part surrounding the central bottom. The hole formed in this way can be inserted by some kind of injection hole similar to that shown in FIG. 1, for example. The bottom 32, which is intended to be inserted into the tube 2, is surrounded by an inner flange 36 which reaches up to and slightly beyond the tube end 50 and is provided with an annular groove at this end position 38 , the annular groove is suitably wedge-shaped in cross-section with an opening facing outwards in terms of the axis, and is provided with a bridging portion 39 pressed against the pipe end 50 in a butt-butting manner. The bridge then connects the outer side of the pipe end to an outer flange 40 which presses against the pipe end from the outside and has an annular projection 41 approximately in the middle of its axial extension which presses against the pipe end. Close to the pipe end and provided for gripping at this pipe end position is an annular protrusion 43 which then forms an annular groove 51 on the inside of the pipe, the inner flange 36 being a peripheral protrusion 37 is inserted into this inner ring groove 51. The free end of the outer flange 40 may be slightly bent outwards and/or formed with an inner bevel 42 to facilitate pushing the cap onto the tube end.

The latter cap is even a plunger in terms of its function, the outer flange 40 for being torn off or the bottom together with the inner flange can be cut off without previous tearing of the inner flange, this is by means of From the greatly reduced thickness of the bottom of the annular groove 38, and in that the bottom of the annular groove is arranged to bear directly against the inner edge portion (which is usually quite sharp) of the pipe end and in that the bridging portion 39 abuts against the pipe end, so that the plunger rod of a grease gun (not shown) can overcome the holding force produced by the protrusions and grooves 37, 43 and 51, and the plunger portion formed on the cap will be deep. Pushing into the tube, the retaining force of the protrusion 41 of the outer flange may have previously been relieved by tearing off the outer flange.

As far as the remaining outer flange is located on the tube, the flange does not need to be provided with a special tear-off mechanism, and is partially fixed in this position after separation from the inner flange and the bottom, because Even after the bridging part is separated, it will still lean against the pipe end from a certain direction, while the flange protrusion 41 will grasp the surrounding portion of the pipe protrusion 43 from another opposite direction. Furthermore, when detaching the plunger consisting of bottom, inner and flange from the positioned outer flange, this will yield the advantage that the protrusion 37 of the inner flange will be held inside the tube in the groove until a certain pressure has been generated whereby the plunger rod acts on the bottom of the cap. When this pressure is exceeded, the protrusion 37 breaks out of the groove 51 in a sudden manner, and the actual pressure magnitude will then suddenly impact on the bottom of the annular groove 38 and tear the thin bottom against the inner edge under the pipe end. In this way, a high threshold can be obtained, preventing simultaneous opening of the closure mechanism creating a very limited area intended for opening.

The nozzle 44, according to Figures 1, 5, 9, 10 and 23 to 26, can be a tube conically converging towards the outside, this tube has an annular projection 45 at its free end, and this projection is a Surrounded by a bottom 47 and a small cap of a sleeve wall 48 with an inner annular projection 49 at an inner position of the sleeve wall. The nozzle is preferably integrated with a cap according to FIGS. 2 , 3 , 9 , 10 or 23 to 26 .

The cap 3 shown by means of two different embodiments in FIGS. 2 and 3 is shown as a third embodiment in FIGS. 9 to 12 , 14 and 20 to 26 . The collar or flange 16 of the cap 3 preferably does not protrude radially beyond the tube flange 10, but ends before reaching the outer edge of the tube flange.

Figures 21 and 24 clearly reveal how the protrusion 24 protrudes from the lateral wall of the cap. Above this projection, the cap starts to slope inwards for connection to a bowl-shaped bottom 19 . In this region for the cap, the tube 2 is configured correspondingly to the tube end 50 and follows the outer side of the cap, or as shown in FIGS. 10 , 12 and 14 . This shape prevents the contents of the tube from spilling and keeps the cap tight. Since the protrusion forms a longer slope downwards with an acute angle, such as 30° to 45°, relative to the lateral wall surface, and the rest of the upward portion is at an angle of, for example, 45° to 90° close to the side wall. By rounding at a small radius, the attachment of the cap can be improved and its inadvertent removal can be ruled out.

Figure 22 shows the cap viewed obliquely from above, the cap revealing an almost triangular handle 52 to facilitate removal of the cap. The grip is integral in shape with the cap and is connected to a point-like area at the uppermost position of the side wall 17 via a small tongue 53 which forms a transition into the cap rim the upper inner side of the department. The wide upper lip prevents the cap from being pushed into the tube. The cap is preferably manufactured as a homogeneous piece, for example by molding polyvinyl chloride.

The combination of Fig. 22 and 14, when pulling this handle portion 52, because the position of handle portion in the hole 54 above the cap and its dotted connection with side wall 17, obviously its direction of the applied force will be consistent with the protrusion. The square arc from 23 becomes a straight line. Thus, the initial point-like removal of the protrusion and the cap from the tube internal groove 11 is enhanced, and the point-like "break" of the cap/tube joint will then continue rapidly along the entire internal groove until the cap The cover is completely removed. If the cap is provided with a sprue, a handle is preferably omitted.

In any case, a cap 3 is preferably provided suitably on top of the container according to FIGS. 2, 3 or according to FIGS. 1, 6, 7 and 9, where, as in FIG. displayed. The profile shows components 6 to 15 and 18 that are similar to corresponding components in FIGS. 2 and 3 . The inward projection of the inner flange 9 can be smaller, while the shape of the undercut surface 13 can be more strictly required to form an acute angle, for example about 30°, with respect to a radial plane.

The rim 18 is formed as a pointed lip that protrudes obliquely downwards and inwards from the surface 12 and forms an angle of 100° to 160° (preferably about 140°) with its upper side 55 from The radial extent of the surface 12 may in a practical example be 0.5 to 5 mm, preferably about 1 mm. FIG. 14 clearly shows how the lip 18 enters with its edge into the corner region between the wall 17 and the projection 24 of the cap. The lip, which is flexible at least due to its shape, will thus easily follow slight variations and movements and thus will easily compensate for eg material shrinkage, even when combined with the cap. The lip can even compensate for the pushing force and keep the cap in place, as described previously, by initially elastically following all movements when the cap expands and when the cap is removed under increasing internal pressure. , increasing the efficiency of this seal design. Due to its pointed shape, this lip even protrudes slightly into the cap material and increases the sealing effect even more. By designing a bevel 56 in the transition area between the surfaces 5 and 12 , the profile facilitates the insertion of, in particular, a cap 3 bonded to a cap bottom bevel 25 .

Figure 19 shows a variant design of the plunger cap embodiment with the most possible features in which all but the annular groove on the bridge can be dispensed with.

Preferably at one location, the outer flange 40 is cut or slit with an axial slit 57, which may have no width or form a gap of eg about 1 mm width. This cutout extends radially at least through the main part, preferably the entire outer flange and even through the bridge 39 . However, it can be seen that the slit does not pass completely through the outer flange in the radial direction, but leaves a thin skin 58 which is preferably located inside the outer flange, that is, so that the outer flange The importance of the uninterrupted exterior will be clearly explained below. In the region of the bridge, the slit can be enlarged from an axial extension to a peripheral extension to connect to the annular groove 38, in this way a tear-off mechanism can be provided, which will be more clearly explained in in the following.

Connected to the cutout 57, a tongue 59 protrudes from the outer flange 40 in the same direction or on a radial plane, which tongue is provided with a protrusion at its free end in an upper position Portion 60 acts as a gripping mechanism. By grasping the tongue and the protrusion and pulling it outwards, one can tear off the outer flange, whereby the thin bottom of the groove 38 will be broken, whereby preferably a thin and pointed The peripheral lip, in the radial direction, is disposed at the outermost position in the axial and radial direction of the inner flange, forming the remainder of the bottom of the annular groove.

In parallel relation to the cutout 57, there may be a similar cutout or equivalent structure 61 leaving a tab 62 of a few millimeters width on the outer flange. It can be seen here that the tongue 59 can alternately be attached to or originate from the tab, or one or several additional cutouts or the like (which can be along the circumference of the outer flange distribution) is important in that in this way, when the cap is applied to, for example, an end of a lubricant cartridge, a slight expansion of the outer flange will be easily done, said end will enter into the An annular gap 63 between the outer flange 40, the inner flange 36, and the bridging portion 39 acts as a bottom boundary. Here, it can be seen that when attaching such a cap, an adhesive medium can be introduced at the same time, which can be applied to the inside of the outer flange and/or the bridge, whereby an additional leak-proof Safety is attainable. The other end of a lubricant cartridge, as an alternative to a cap 3, can be sealed with an adhesive surface or a laminate of plastic material and/or metal foil layers and/or splints, the surface or the like can be It is easily prepunctured with a sharp part such as a spout, through which the lubricant will be delivered.

Lubricant cartridges or similar structures sealed by a cap according to the present invention provide great security against leakage because the internal flange will seal the lubricant cartridge along a large axial extent The bridging effect of the further seal in a radial plane and the outer flange will eventually allow an additional seal to be produced even on the outside of a lubricant cartridge along most of its actual length. The attachment of a cap according to the invention is a simple procedure which can be carried out very quickly by conventional machinery. As for other features, the plunger cap has been previously disclosed and shown in, for example, FIGS. 4 and 13 .

When, for example, a lubricant is to be sent out of a tube, the tongue is grasped, and then the outer flange will be torn off quickly and easily, so that only the bottom 32 and the inner flange and the bridge A small sharp portion of the cap remains at the free end position of the inner flange, these portions being located within the tube, where the remaining portion of the cap can advantageously be used for dispensing the contents by means of a plunger . Here, a plunger rod or the like is brought to the outside against the bottom of the cap, and the protrusions can act as zoned or centered mechanisms, and the plunger thus formed can be moved by a The plunger rod is displaced along the entire lubricant cartridge until its contents have been dispensed completely. Here, it is preferred that the inner flange diverges slightly away from the bottom 32 so that the free edge and the lip of the inner flange rest against the inside of a tube with some tension. This ensures that the contents are only forced forwards and do not pass through between the inner flange and the wall of the tube.

An annular protrusion or similar structure 37 at a position outside the inner flange can be a further mechanism to act on the tube wall, whether it is only coupled to the lip-shaped remainder of the inner flange or even to the bottom of the cap and the transition area between the inner flange, these parts can thus be aligned according to the above design possibilities.

The present invention thus proposes a very advantageous and practical double function of a cap, and the whole lubricant handling does not leak out, and is more simple and adaptable to the needs of the environment and even saves costs.

The invention is not limited to the previously described embodiments, but also includes obvious modifications without departing from the scope of protection of the claims.

Claims (10)

1. A container (1) comprising a cap (31) for sealing an end (50) in particular of a mainly cylindrical tube (2) for viscous or pasty substances, the cap The cap has a bottom (32) from which protrudes in a generally axial direction a peripheral inner flange (36) intended to bear against the inside of the rim, and the cap will have a double Function, that is, in addition to the sealing function, a second function is to serve as a plunger for distributing the contents of the tube by a plunger rod, and the boundary edge portion of the inner flange (36) bent away from the bottom is connected to a bridging portion (39), the bridging portion is generally located in a radial plane, the bridging portion leads to an outer flange (40) approximately coaxial with the inner flange, the outer flange along with the inner The flange and the bridging portion surround the pipe end, the plunger cap is provided with a grooved peripheral frangibility (38) to allow disengagement of the bottom during transition to plunger function, characterized in that: the A frangible portion (38) is provided in or on the bridging portion (39) and at least one surface of the flange and the tube facing each other is provided with at least one peripheral blocking and/or sealing mechanism acting on the other. On one side, for at least temporarily positioning or holding or sealing the plunger cap (31) relative to the tube. 2. Container according to claim 1, characterized in that the outer side of the bottom (32) is provided with an axial, in particular conical, protrusion (34) at a central position, this protrusion being intended for The compartmentalized or centered mechanism of the plunger rod as a feeding mechanism, for sending out the contents, and the protrusion is surrounded by a coaxial annular groove (35), in which the material of the bottom The thickness is reduced, and the thus enclosed portion is continuous with the enclosed bottom portion via a bridge (63) extending radially through the annular groove (35). 3. The container according to claim 1 or 2, characterized in that, the axial length of the inner flange (36) is from a few millimeters to several centimeters, and/or the inner flange (36) turns away from the bottom is provided with a bevel, and/or the bridge (39) has a radial extent of 0.2 to 5 mm, and the thickness of the bridge in the area of the weak portion (38) reaches approximately the inner flange (36 ) thickness, the outer flange (40) has a thickness equal to or less than the thickness of the inner flange (36), but in any case greater than the thickness of the bridging portion (39), and the bottom (32) is Both flanges are thick. 4. The container according to claim 1, characterized in that there is a peripheral bevel (42), on the plane of the bottom (32), connected to the outer flange (40) and turning away from the bridge (39) The bevel is slightly bent to facilitate access to the plunger cap and/or to tear off the outer flange. 5. The container according to claim 1, characterized in that, the outer flange (40) is cut or cracked with an axial slit (57), which may have no width or be designed with a gap of about 1mm width , this cut (57) extends radially at least through the main part, not the entire outer flange and a possibly outwardly bent bevel (42) and even through the bridge (39), but leaves a thin skin (58) , the surface is located inside the outer flange, i.e. such that the outer flange extends uninterrupted around the outside of the plunger cap, and/or within the region of the bridge, the cutout can be extended from an axial The extension to a circumference is enlarged as a tear indication, and/or a tongue (59) protrudes from the outer flange in the region of the cutout as a tear indication, the tongue at its The free end is provided at the upper position with a protrusion (60) acting as a gripping mechanism, and/or with several axial cuts or gaps (61) passing completely or partly through the outer flange and leaving gaps between each other. The lower tab (62) acts as a tear indicator. 6. Container according to claim 1, characterized in that the outer flange (40) has an annular projection (41) pressed against the tube at the middle of its axial extent, this annular projection is used to This pipe end position grips an annular projection (43) which then forms an annular groove (51) on the inside of the pipe end, the inner flange (36) being a peripheral projection (37) Insert this inner ring groove. 7. Container according to claim 1, characterized in that the other end (4) of the tube is surrounded by a flange (5) extending from a separate cylindrical surface of the tube wall (6). (7) and (8) extend radially inwardly and outwardly to form an inner flange (9) and an outer flange (10), and the inner flange (9) extends from the adjacent cylindrical surface (7) protrudes longer than the outer flange (10) from the cylindrical surface (8) and the other tube end (4) is sealed by a cap (3) which provides Retained by the inner flange with a greater force than the outer flange, the inner flange (9) and the outer flange (10) suitably share a common free axis forming the pipe end (4) To the upper limit surface (11) of the end surface, the outer flange (10) is defined by a shoulder (15) lying in a radial plane at its axial end position turned away from the limit surface (11). defined, and the inner flange is terminated in a corresponding area to form an undercut surface (13), which may be straight or concave to form a pointed rim portion (18), the purpose of which is to An additional sealing effect is produced with respect to the cap (3) by an angle between the undercut surface (13) and an adjoining inner surface (12) of the pipe end profile of 30° to 85°, and/or can be an angle not equal to 90°, i.e. an angle greater than 90°, and/or the outer position of the surface (12) is provided with a slope or curvature, and/or the rim (18) is configured to is a pointed lip protruding obliquely downward and inward from the abutment surface (12) and forming an angle of -100° to 160° with its upper side (55), and from the abutment inner surface (12) The radial length reaches 0.5 to 5mm, and the lip (18) is intended to enter the corner area between the lateral wall (17) of the cap (3) and the adjacent protrusion (24) with its edge, the lip (18) The lip is flexible at least because of its shape and will follow any variations and movements and compensate even when bonded to the cap, and because of its pointed shape it can protrude slightly into the cap material and increase the seal effect, and/or in the transfer zone between the end surface (11) and the inner surface (12), there is a bevel (56) on the upper side and the inner side of the pipe end profile, for enhancing a cap (3), especially Insertion combined with a bevel (25) at the bottom of the cap; The cap (3) is partially matched to the shape of the pipe end (4); the cap has a collar portion (16) on a radial plane connected inwardly to a right cylindrical The ring part (17), the right cylindrical ring part is closed by a bottom (19), and this bottom is slightly concave; the three parts (16, 17) and (19) have roughly the same material thickness; In the outward direction, the collar portion (16) is connected to an outer right cylindrical collar portion (20), which is in the axial direction, measured from the collar portion (16), to the inner The ring portion (17) is equal or slightly longer; Said parts (16, 17) and (20) define an annular groove (21) for volume and abutment against the pipe end (4); parts (17) and (20) are respectively provided with peripheral shoulders, protrusions or Its analogues (24) and (28), which face each other and the difference in axial extension between the inner and outer flanges are slightly offset from each other in the axial direction; after a cap is tightly closed , the shoulders, protrusions or the like (24) and (28) are provided directly below the surfaces (13) and (15) so that the cap is not stretched away from the tube end (4) Then it cannot be removed; the free axial half (27) of the ring portion (20) can be bent slightly outwards or a peripheral internal bevel (29) can be provided to facilitate the pushing of the cap onto the pipe end On; the half connected to the bottom (19) by the ring portion (17) may be provided with a slope (25). 8. The container according to claim 1, characterized in that the cap (3) is partly matched to the shape of the tube end (4) and is positioned on a radial plane with a collar portion (16) and Inwardly connected to a right cylindrical ring part (17), this right cylindrical ring part is closed by a bottom (19), and this bottom is slightly concave, and this ring part (16) is connected outward to an outer right-cylindrical collar portion (20), which is as long or slightly longer than the inner collar portion (17) in the axial direction, measured from the collar portion (16), And the cap periphery (16, 17, 20) defines an annular groove (21) for capacity and abutment against the pipe end (4), for which purpose a peripheral shoulder, protrusion or the like is provided ( 24) and (28), which face each other but are slightly offset from each other in the axial direction After being tightly covered, the shoulders, protrusions or the like (24) and (28) are provided directly on the surface 13) and (15), so that the cap cannot be removed without considerable stretching away from the tube end (4), and the free axial half (27) of the collar portion (20) faces slightly towards The outside is bent or provided with a peripheral internal bevel (29), and/or the half of the ring portion (17) connected to the base (19) is provided with a bevel (25). 9. The container according to claim 1, characterized in that the protrusion (24) protrudes from the side of the lateral wall of the cap, continuing the protrusion, the cap is inclined inwardly to connect to a bowl-shaped bottom (19), the protrusion forming a longer slope downwards with an acute angle, while the rest upwards is rounded at a small radius at an angle close to the lateral walls, and/ Or an upper hole is located in the cap and has a handle (52), which is designed as a single piece with the cap and is attached to the side wall (17) via a small tongue (53). The uppermost position is connected to a point-shaped area, the tongue is connected to the upper inner side of the cap rim, and/or the bottom (19) is provided with a sprue (44), which is a tapered outward converging and at its free end an annular projection (45), which will be surrounded by a small cap (46) with a bottom (47) and a sleeve wall (48), and at the There is an inner annular protrusion (49) on the inner side of the sleeve wall. 10. The container according to claim 1, characterized in that the outer flange (40) is for being torn off or the bottom together with the inner flange is for being cut off without previous removal of the inner flange , the bottom of the annular groove (38) is greatly reduced in thickness, and/or the bottom of the annular groove is arranged to directly press against the inner edge of the individual pipe end (30), which is quite sharp , the bridging portion (39) is arranged to butt against the pipe end for enhancement, and a plunger rod of a grease gun or similar structure is intended to overcome The resulting holding force pushes the plunger portion formed on the cap deep into the tube, the holding force of the protrusion (41) of the outer flange may have been previously removed by tearing off the outer flange, and /or the outer flange is intended to be left on the tube and is provided with a special tear-off mechanism, and is fixed in this position after separation from the inner flange and the bottom, because the bridge even after separation Still will lean against the tube end from one direction, and the projection (41) of this flange will be grasped on this tube projection (43) periphery from another opposite direction, when making this by bottom and internal flange When the formed plunger is separated from the outer flange still in position, the inner projection (37) will be held in the inner groove of the tube until a certain pressure has been reached, whereby the pressure - plunger rod is Pushed on the bottom of the cap, and when this pressure is exceeded, the protrusion (37) breaks away from the groove (51) in a sudden manner, causing the actual pressure to act as an impact on the bottom of the ring groove (38) to tear off the thin bottom against the inner edge of the tube end, and in this way create a high threshold to prevent inadvertent opening of the closure mechanism while creating a very limited area intended for opening .

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